| Event name: | US-24-004 | |
| Country: | UNITED STATES | |
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Nature of the harmful event: |
Mass mortalities | |
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Event directly affected: |
Natural Fish | |
| Toxicity detected: | Yes (Approximate range: Spinning fish first observed in October/November. First samples with Gambierdiscus collected by FWC from 1/18/25) | |
| Associated syndrome: | CFP (Ciguatera Fish Poisoning) | |
| Unexplained toxicity: | ||
| Species implicated in toxin transmission (transvector): | ||
| Report the outcome of a monitoring programme: | Yes (Florida Fish and Wildlife Conservation Commission-Fish and Wildlife Research Institute /Florida Department of Agriculture and Consumer Service) | |
| Event occurred before in this location: | No | |
| Individuals to contact: | HUBBARD, Katherine , ZAHARA, Meredith | |
| Location: | Latitude: , Longitude: | |
| General location information: |
Florida Keys, Southern Florida HAB Area code(s): US-15 |
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| Additional location information: | Region 15 and 16 First observation of Gambierdiscus = 1/18/24. Last observation = 7/24/24. We began to find Gambierdiscus again in samples from 10/18/24 and are continuing to monitor. | |
| Bloom event dates (yyyy/mm/dd): | Start: 2024-01-18, End: 2024-07-24 | |
| Quarantine levels dates (yyyy/mm/dd): | ||
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| Causative organism known: | Yes | |
| Causative Species/Genus: |
Gambierdiscus spp.
(12,333 (2/2/24) cells/L)
Cell enumeration of seawater (note, this is typically an epiphytic species, and it is suspected that the bottom was disturbed; once this was addressed, we never observed >4000 cells/L) |
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| Chlorophyll concentration, if known: | µg/l | |
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| Temperature Range During Event: | Max: 32.5 °C, Min: 19.42 °C | |||||||||||||||||||||||||
| Salinity Range During Event: | Max: 39.17, Min: 19.6 | |||||||||||||||||||||||||
| Bloom location in the water column: | Whole column | |||||||||||||||||||||||||
| Growth: |
In situ |
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| Growth Comments | Epiphyte, so these estimates in water not true reflections of biomass on macroalgae and sea grass | |||||||||||||||||||||||||
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